14
11. Faults, causes and remedy
11.1 Restarting after fault
If the converter has cut out because of one of the faults shown in
section
, the converter must be reset before the pump can be
restarted. Press [F2]. Locate the fault according to the table
below, and correct the fault.
Press [F2] on the converter. Then the display indication will
change into the initial display text. See fig. 10. The pump is now
ready for restarting. See section
.
11.2 Converter fault indications
If the motor, motor cable, converter or converter cable is defective, please contact your nearest Grundfos distributor.
For other possible display texts, see page 62.
12. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest Grundfos company
or service workshop.
Fault (display text)
Cause
Remedy
1. Overcurrent
The motor current exceeded the peak limit.
Reduce the frequency.
Check the motor for overload.
2. Desaturation
The motor current exceeds the desaturation limit.
Check the motor for blockage and short-circuit of the
motor cable.
3. Ground fault
A ground fault has been detected (leakage to
ground).
Check the motor cable and the MP 1 with a
megohmmeter. The insulation resistance must be higher
than 0.5 M
Ω
at 1000 V.
Note:
Before measuring the resistance, disconnect the
motor cable plug from the converter.
4. Overload
1 minute
The output current exceeded the limit for more than
1 minute.
Reduce the frequency.
5. Overload
3 seconds
The output current exceeded the limit for more than
3 seconds.
Reduce the frequency.
6. Motor overload
The motor current exceeded the preset limits:
• 125 % for 590 seconds
• 150 % for 150 seconds
• 200 % for 50 seconds.
Reduce the frequency.
Check the motor for overload.
7. DC bus high
The AC mains voltage is higher than 300 V.
Check that the mains voltage lies within the voltage
range, 1 x 220-240 V – 15 %/+ 10 %.
8. DC bus low
The AC mains voltage is lower than 163 V.
Check that the mains voltage lies within the voltage
range, 1 x 220-240 V – 15 %/+ 10 %.
9. Drive over temp.
Converter temperature above +85 °C.
Check that the ambient temperature is lower than +45 °C.
10. Drive low temp.
Converter temperature below –10 °C.
The converter temperature must be above –10 °C before
use.
Subject to alterations.
